88213231 has 2 divisors, whose sum is σ = 88213232. Its totient is φ = 88213230.

The previous prime is 88213207. The next prime is 88213247. The reversal of 88213231 is 13231288.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88213231 is a prime.

It is a super-2 number, since 2×88213231² = 15563148246918722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 88213231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88213831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44106615 + 44106616.

It is an arithmetic number, because the mean of its divisors is an integer number (44106616).

Almost surely, 2^88213231 is an apocalyptic number.

88213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

88213231 is an equidigital number, since it uses as much as digits as its factorization.

88213231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The square root of 88213231 is about 9392.1898937362. The cubic root of 88213231 is about 445.1549870442.

The spelling of 88213231 in words is "eighty-eight million, two hundred thirteen thousand, two hundred thirty-one".